package main

import (
	"log"
	"os"
	"time"

	"maunium.net/go/mautrix"
)

type Config struct {
	Userid string
	Server string
	Token  string
	Name   string
	Owner  string
}

type Bot struct {
	Client           *mautrix.Client
	Rooms            map[string]int
	Conf             *Config
	ManagementRoomID string
}

func main() {
	c := &Config{
		Userid: "@testbot:saintnet.tech",
		Server: "matrix.saintnet.tech",
		Token:  "MDAxYmxvY2F0aW9uIHNhaW50bmV0LnRlY2gKMDAxM2lkZW50aWZpZXIga2V5CjAwMTBjaWQgZ2VuID0gMQowMDI5Y2lkIHVzZXJfaWQgPSBAdGVzdGJvdDpzYWludG5ldC50ZWNoCjAwMTZjaWQgdHlwZSA9IGFjY2VzcwowMDIxY2lkIG5vbmNlID0gemlKZGs9bmJhcjp1eThIXgowMDJmc2lnbmF0dXJlIE4x0sbUS9lN-fi0KjJmEmpx6_wpYzgvk4k2Eugtkva7Cg",
		Name:   "TestBot",
		Owner:  "@stryan:saintnet.tech",
	}
	b := NewBot(c)
	syncer := NewCustomSyncer("@testbot:saintnet.tech", b.Client.Store)
	syncer.OnEventType(mautrix.EventMessage, b.handleMessage)
	syncer.OnEventType(mautrix.StateMember, b.handleMember)

	b.Client.Syncer = syncer
	go func() {
		err := b.Client.Sync()
		if err != nil {
			log.Fatal(err)
		}
	}()
	log.Println("Syncing enabled")
	resp, err := b.Client.JoinedRooms()
	if err != nil {
		log.Fatal(err)
	}
	for _, v := range resp.JoinedRooms {

		mem, err := b.Client.JoinedMembers(v)
		if err != nil {
			log.Fatal(err)
		}
		if len(mem.Joined) > 1 {
			b.Rooms[v] = len(mem.Joined)
			log.Printf("%v is in Room %v\n", b.Conf.Name, v)
		} else {
			_, err := b.Client.LeaveRoom(v)
			if err != nil {
				log.Fatal(err)
			}
			_, err = b.Client.ForgetRoom(v)
			if err != nil {
				log.Fatal(err)
			}
			log.Printf("%v was in Room %v, left due to being last one there\n", b.Conf.Name, v)
		}

	}
	err = b.createManagementRoom()
	if err != nil {
		log.Fatal(err)
	}
	log.Println("Begining main loop")
	for {
		time.Sleep(2 * time.Second)
	}

}

func NewBot(c *Config) *Bot {
	client, err := mautrix.NewClient(c.Server, c.Userid, c.Token)
	if err != nil {
		log.Fatal(err)
	}
	b := &Bot{Client: client, Rooms: make(map[string]int), Conf: c, ManagementRoomID: "!fxioaRvcDbKKhCpHrZ:saintnet.tech"}
	return b
}

func (b *Bot) createManagementRoom() error {
	if b.ManagementRoomID != "" {
		log.Printf("%v already has management room %v\n", b.Conf.Name, b.ManagementRoomID)
		return nil
	}
	log.Printf("Creating Management Room for %v\n", b.Conf.Name)
	respCreateRoom, err := b.Client.CreateRoom(&mautrix.ReqCreateRoom{
		Preset:     "trusted_private_chat",
		Visibility: "private",
		Name:       "TestBot Control Room",
		Invite:     []string{b.Conf.Owner},
		IsDirect:   true,
	})
	b.ManagementRoomID = respCreateRoom.RoomID
	if err != nil {
		return err
	} else {
		log.Printf("%v created management room %v\n", b.Conf.Name, respCreateRoom.RoomID)
		return nil
	}
}

func (b *Bot) handleMessage(e *mautrix.Event) {
	if e.Sender == b.Conf.Userid {
		return //we don't care about our own messages
	}
	body := e.Content.Body
	if body == "stop" {
		b.Client.SendText(e.RoomID, "Shutting down...")
		b.Client.StopSync()
		os.Exit(0)
	}

	_, err := b.Client.SendText(e.RoomID, body)
	if err != nil {
		log.Fatal(err)
	}
}

func (b *Bot) handleMember(e *mautrix.Event) {
	mbr := e.Content.Membership
	if mbr == mautrix.MembershipInvite {
		if e.Sender == b.Conf.Owner && e.GetStateKey() == b.Conf.Userid {
			log.Printf("%v joining room: %v\n", b.Conf.Name, e.RoomID)
			_, err := b.Client.JoinRoom(e.RoomID, "", nil)
			if err != nil {
				log.Fatal(err)
			}

		}
	}
	if mbr == mautrix.MembershipJoin {
		log.Printf("A user joined a room %v cares about\n", b.Conf.Name)
		b.Rooms[e.RoomID] = b.Rooms[e.RoomID] + 1
	}
	if mbr == mautrix.MembershipLeave && e.Sender != b.Conf.Userid {
		b.Rooms[e.RoomID] = b.Rooms[e.RoomID] - 1
		if b.Rooms[e.RoomID] < 2 {
			log.Printf("%v is last in a room, leaving.\n", b.Conf.Name)
			_, err := b.Client.LeaveRoom(e.RoomID)
			if err != nil {
				log.Fatal(err)
			}
			_, err = b.Client.ForgetRoom(e.RoomID)
			if err != nil {
				log.Fatal(err)
			}
		}
	}
}